Well once again Hood had the info early on. It's now announced in New York Times.

The book, to be edited by the hip-hop journalist Sacha Jenkins, will be loosely structured as an oral history. It will also have contributions by other writers, as well as a strong visual component. Ms. Grau and Luke Janklow, the group’s agent, both compared it to Grand Royal, the Beastie Boys’ acclaimed but short-lived magazine in the 1990s, which explored some of its wide-ranging pop-culture interests with curiosity and snark. “The first words out of Mike’s mouth were, ‘I don’t want to do a straight memoir,’ ” said Mr. Janklow, of the firm Janklow & Nesbit.

Mr. Janklow said he had been in discussions with the group several years ago about the possibility of a book, but they were set aside as the third Beastie Boy, Adam Yauch, known as MCA, began to suffer from cancer of the salivary gland; he died last year at 47.
“After Yauch died, I didn’t push them,” Mr. Janklow said, “but I think that

Adam and Mike ended up realizing that it was the right time for them.” A spokesman for the Beastie Boys did not respond to a request for comment.

“interested in challenging the form and making the book a multidimensional experience. There is a kaleidoscopic frame of reference, and it asks a reader to keep up.”

I hope its not too difficult to read... I'm looking for the info more than I am an artistic statement, personally. Like a magazine format or some kind of weird non-sequential thing would be a little disappointing. Multidimensional could mean alot of things though. My guess is that it will will involve text, photos, sounds, perhaps internet links. Or perhaps it will be kinda like the audio commentaries, with an accompanied program of photos(?)

its foolish to even speculate, i know. shit will be a real treat though, thats for sure

So excited to hear this! Whatever the book is like, I know Mike and Adam will do it right. Book signings are a must!

...one might say that the Beastie Boy "Fight for Your Right to Party" guy is a hypocrite. Well, maybe; but in this fucked up world all you can hope for is change, and I'd rather be a hypocrite to you than a zombie forever.
-Adam Horovitz